Blueair Blue Pure 511i Max vs Dreo Air Purifier 338S

Tested using Methodology v1.3.1

Updated Aug 10, 2026 04:33 PM

This review is in Early access

See Blueair Blue Pure 511i Max Review

HEPA Certified No

Activated Carbon Sheet

HEPA Certified Yes

Activated Carbon Pellets

Recommended in 2 articles:
Quiet
Basements

Our Verdict

Blueair Blue Pure 511i Max

Dreo Air Purifier 338S

Full comparison details regarding individual product score sets can be found in the section below

Variants

Blue Pure 511i Max (Gray)

Air Purifier 338S (Black)
Air Purifier 338S (White)

Review

See Dreo Air Purifier 338S Review

Check Price

Gray

Blue Pure 511i Max

Black

Air Purifier 338S

Gray

Blue Pure 511i Max

BestBuy.com

White

Air Purifier 338S

Gray

Blue Pure 511i Max

Blueair

Gray

Blue Pure 511i Max

Walmart.com

Gray

Blue Pure 511i Max

Lowes.com

Gray

Blue Pure 511i Max

HomeDepot.com

Main Differences for

Pets

Threshold

0.10

Pets

7.4

0.0

No major differences between these air purifiers for pets. See full list of tests below.

Full Comparison

Pets

7.4

0.0

Particle Filtration Rate

7.0

0.0

Bedroom

8.3

0.0

Footprint

7.6

0.0

Design

Body

Weight

4.4 lbs (2.0 kg)

Lock lbs (Lock kg)

Power Cord Length

73.4" (186.5 cm)

Lock" (Lock cm)

Wheels

Locked

Footprint

7.6

N/A

Compactness Photo

SAMPLE

for pictures & test results

Width

9.4" (23.9 cm)

Lock" (Lock cm)

Depth

9.4" (23.9 cm)

Lock" (Lock cm)

Height

14.6" (37.1 cm)

Lock" (Lock cm)

Display And Control

Main Controls

SAMPLE

for pictures & test results

Alternative Controls

SAMPLE

for pictures & test results

Filter Change Indicator

Yes

Locked

Air Quality Sensor Auto Mode

Yes

Locked

Remote Control

Locked

App

Yes

Locked

Display On/Off

Yes

Locked

Timer Function

Yes

Locked

Number Of Fan Speeds

Lock

Filter Configuration

Filter Configuration Photo

SAMPLE

for pictures & test results

Filter Localization Photo

SAMPLE

for pictures & test results

HEPA Certified

Locked

Filtration Layers

3 Stage

Locked

Activated Carbon

Sheet

Locked

Performance

Particle Filtration Rate

7.0

N/A

Purification Graph

Preview Graph

SAMPLE

for pictures & test results

Measured PM1.0 CADR

255 m³/hr (150 CFM)

Lock m³/hr (Lock CFM)

Recommended Room Size @ Max Fan Speed

21.8 m² (234 ft²)

Lock m² (Lock ft²)

Low-Noise Particle Filtration Rate

5.7

N/A

Purification Graph @ ≤ 45dBA

Preview Graph

SAMPLE

for pictures & test results

Measured PM1.0 CADR

99 m³/hr (59 CFM)

Lock m³/hr (Lock CFM)

Fan Speed Used

Speed 2

Locked

Recommended Room Size

8.5 m² (91 ft²)

Lock m² (Lock ft²)

Noise

9.0

N/A

Noise Video

SAMPLE

for videos & test results

Noise @ Lowest Fan Speed

30.8dBA

LockdBA

Noise @ Highest Fan Speed

53.9dBA

LockdBA

Check Price

Gray

Blue Pure 511i Max

Black

Air Purifier 338S

Gray

Blue Pure 511i Max

BestBuy.com

White

Air Purifier 338S

Gray

Blue Pure 511i Max